Celebs Show Support for Andy Roddick & Serena Williams at U.S. Open

Kim Kardashian, attends the U.S. Open on September 8 in Flushing Meadows, New York.

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Andy Roddick played a tennis match with David Ferrer on Day 11 in the U.S. Open at the Billie Jean King National Tennis Center in Flushing Meadows, New York on Sept. 8.

Andy Roddick played a tennis match with David Ferrer on Day 11 in the U.S. Open at the Billie Jean King National Tennis Center in Flushing Meadows, New York on Sept. 8.

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Andy Roddick played a tennis match with David Ferrer on Day 11 in the U.S. Open at the Billie Jean King National Tennis Center in Flushing Meadows, New York on Sept. 8.

Brooklyn Decker watched on as her husband Andy Roddick played a tennis match with David Ferrer on Day 11 in the U.S. Open at the Billie Jean King National Tennis Center in Flushing Meadows, New York on September 8.

Brooklyn Decker watched on as her husband Andy Roddick played a tennis match with David Ferrer on Day 11 in the U.S. Open at the Billie Jean King National Tennis Center in Flushing Meadows, New York on September 8.

Brooklyn Decker watched on as her husband Andy Roddick played a tennis match with David Ferrer on Day 11 in the U.S. Open at the Billie Jean King National Tennis Center in Flushing Meadows, New York on September 8.

Ciara attends the U.S. Open on September 8 in Flushing Meadows, New York.

Kim Kardashian and Ciara attend the U.S. Open on September 8 in Flushing Meadows, New York.

Kim Kardashian and Ciara attend the U.S. Open on September 8 in Flushing Meadows, New York.

Kim Kardashian and Jonathan Cheban attend the U.S. Open on September 8 in Flushing Meadows, New York.

Kim Kardashian and Jonathan Cheban attend the U.S. Open on September 8 in Flushing Meadows, New York.

Serena Williams returns to Anastasia Pavlyuchenkova during a U.S. Open match at the Billie Jean King National Tennis Center in Flushing Meadows, New York on Sept. 8.

Serena Williams returns to Anastasia Pavlyuchenkova during a U.S. Open match at the Billie Jean King National Tennis Center in Flushing Meadows, New York on Sept. 8.

Serena Williams returns to Anastasia Pavlyuchenkova during a U.S. Open match at the Billie Jean King National Tennis Center in Flushing Meadows, New York on Sept. 8.

Kim Kardashian and Ciara attend the U.S. Open on September 8 in Flushing Meadows, New York.